question The balanced chemical equation for the reaction between hydrogen peroxide H O and manganese dioxide MnO is

In the periodic table, elements in the same period have the same number of:

A. Electrons shells
B. Valence electrons
C. Protons
D. Neutrons

What is the expression for the Arrhenius equation, which describes the temperature dependence of reaction rates?

A. k = A * e^(-Ea/RT)
B. k = A * e^(Ea/RT)
C. k = A * e^(-RT/Ea)
D. k = A * e^(RT/Ea)

What is the product of the reaction between hydrochloric acid (HCl) and magnesium carbonate (MgCO₃)?

A. Magnesium chloride and water
B. Carbon dioxide and water
C. Magnesium chloride and carbon dioxide
D. Magnesium hydroxide and carbon dioxide

What is the term for a bond formed by the attraction between positive metal ions and delocalized electrons?

A. Metallic
B. Ionic
C. Covalent
D. Polar

The element with the highest atomic number is:

A. Oganesson
B. Radon
C. Francium
D. Radium

Which molecule serves as the primary energy currency in cells, providing energy for various cellular processes?

A. Adenosine triphosphate (ATP)
B. Deoxyribonucleic acid (DNA)
C. Ribonucleic acid (RNA)
D. Glucose

What is the relationship between the freezing point (F) and boiling point (B) in the Celsius scale for water?

A. B = F + 100
B. B = F + 32
C. B = F - 32
D. B = F - 100

What is the term for a reaction in which one element displaces another from a compound?

A. Displacement
B. Redox
C. Combustion
D. Synthesis

Which macromolecule is composed of amino acid monomers and plays a crucial role in structure and function in living organisms?

A. Protein
B. Carbohydrate
C. Lipid
D. Nucleic acid

The reaction between an alkane and a halogen in the presence of sunlight is known as:

A. Halogenation
B. Hydrogenation
C. Hydration
D. Dehydration